Introduction
Finding a plant that thrives in the shade while producing a non-stop parade of brilliant color is one of the most rewarding moments for any home gardener. We often hear from gardeners who are looking for a way to brighten up a dark porch or a quiet corner under a leafy tree. Begonias are the perfect answer to this search, offering a stunning variety of textures and tones that last from the first warm days of summer all the way until the first frost.
At Longfield Gardens, we enjoy seeing how these versatile plants transform gardens across the country. Whether you have a sprawling backyard or a few well-placed pots on a balcony, begonias provide a lush, tropical feel with very little effort. This guide is designed for anyone who wants to bring that vibrant energy into their own space, regardless of their previous gardening experience.
We will explore the different types of begonias, the best times to get them in the ground, and the simple steps you can take to ensure they bloom beautifully all season long. You will learn that with just a little bit of planning, these plants can become the highlights of your outdoor living area. Planting begonias is an achievable and joyful project that rewards your efforts with months of spectacular floral displays.
Can You Plant Begonias in Your Garden?
The short answer is a resounding yes. Begonias are some of the most adaptable plants in the gardening world. While they are tropical in origin, they have been bred to perform exceptionally well in a wide range of American climates. The key to success is understanding that while they are easy to grow, they do have a few specific preferences regarding temperature and light.
Most begonias are grown as annuals in most parts of the United States. This means they grow, bloom, and complete their life cycle in a single season. However, in warmer regions like southern Florida or parts of California, they can often live year-round. For the rest of us, we simply plant them in the spring and enjoy them until the weather turns cold.
The beauty of begonias is that they fit into almost any garden plan. If you have a flower bed that doesn't get much sun, begonias will be happy there. If you prefer gardening in containers because you have limited space, begonias are among the best choices for pots and hanging baskets. They are not demanding plants, and they generally get along well with other shade-loving neighbors like hostas and ferns.
Identifying the Best Type for Your Space
Before you start digging, it is helpful to know which type of begonia you are working with. While there are thousands of species, most home gardeners will choose from a few popular tuberous begonias. Each has its own personality and growth habit.
Tuberous Begonias
These are the showstoppers of the family and are the primary focus for many of our favorite garden designs. Tuberous begonias grow from a thickened, underground stem called a tuber. They are famous for their large, rose-like flowers that can be quite dramatic in size and color. You can find them in upright varieties for garden beds or cascading varieties that spill elegantly over the sides of hanging baskets.
Wax Begonias
Wax begonias are the hardy workers of the garden. They have shiny, succulent-like leaves and smaller, more numerous flowers. These are often used as bedding plants to create a carpet of color. They are slightly more tolerant of sunlight than tuberous varieties, making them a good choice for areas that get a mix of sun and shade.
Rex Begonias
If you love interesting foliage, Rex begonias are the choice for you. These are primarily grown for their incredible leaves, which feature swirls of silver, purple, burgundy, and green. While they do produce small flowers, the foliage is the main attraction. They are frequently grown as houseplants but look stunning in shaded summer containers as well.
Cane Begonias
Often called "Angel Wing" begonias because of their long, pointed leaves, these plants grow on tall, bamboo-like stems. They are very sturdy and can grow quite large over time. They produce clusters of dangling flowers and are exceptionally easy to transition from an outdoor summer plant to an indoor winter houseplant.
Key Takeaway: Choosing the right begonia depends on your goal. Choose tuberous types for big, bold flowers, wax types for mass plantings, and Rex types for stunning leaf patterns.
Timing Your Planting for Success
Begonias are tropical plants at heart, which means they love warmth. The most important rule for planting begonias is to wait for the right temperature. They are very sensitive to frost and will not thrive if the soil is cold and clammy.
In most regions, you should wait to plant your begonias outdoors until the danger of frost has completely passed. A good rule of thumb is to wait until the nighttime temperatures are consistently staying above 50°F. If you plant them too early, the cold can stunt their growth or damage the tender leaves. If you are eager to get a head start, start your begonia tubers indoors 6 to 8 weeks before the last frost date gives the plants time to develop a strong root system.
This is a great way to maximize your growing season, especially in northern states where the summer is shorter.
Selecting the Perfect Location
Matching the plant to the right spot is the secret to a thriving garden. For begonias, this almost always involves finding a place with "bright shade." While we often think of plants needing full sun to flower, begonias are different.
Light Requirements
Most begonias prefer filtered light or dappled shade. Imagine the light under a tall tree where the sun peeks through the leaves but never shines directly and harshly on the ground. Direct afternoon sun can be too intense for the delicate petals and leaves, causing them to scorch or turn brown. If you have a spot that gets gentle morning sun and shade in the afternoon, your begonias will be very happy. For more on this, see summer bulbs for shady gardens.
Soil and Drainage
Begonias need soil that is rich in organic matter but also drains quickly. They do not like to have "wet feet," which means their roots should not sit in standing water. If your garden soil is heavy clay, it is a good idea to add some compost or peat moss to lighten it up. For container gardening, a high-quality potting mix is usually perfect because it is designed to hold just enough moisture while letting the excess drain away.
Air Circulation
To keep your plants healthy and looking their best, try to plant them in a spot with decent air movement. If they are packed too tightly in a stagnant corner, they can occasionally develop mildew on their leaves. Giving them a little bit of breathing room helps keep the foliage dry and vibrant.
How to Plant Begonia Tubers
If you have chosen tuberous begonias, you will likely be starting with firm, brown tubers that look a bit like small potatoes. How to Plant Tuberous Begonias: Which End Is Up? explains the simple orientation check.
- Check the Orientation: Begonia tubers have a "right side up." One side of the tuber will be slightly indented or hollow, like a shallow bowl. This is the top. The rounded side is the bottom.
- Prepare the Soil: Loosen the soil in your garden bed or fill your container with potting mix.
- Place the Tuber: Set the tuber into the soil with the hollow side facing up.
- Set the Depth: You only need to cover the tuber with about an inch of soil. Planting them too deep can make it difficult for the sprouts to reach the surface.
- Spacing: Space your tubers about 8 to 12 inches apart. This gives the plants enough room to fill out without crowding each other.
- Initial Watering: Water the area lightly to settle the soil. You want the soil to be moist, but be careful not to overwater at this stage. The tuber needs to wake up slowly.
What to Do Next:
- Identify the hollow side of the tuber.
- Place it 1 inch deep in well-draining soil.
- Space multiple tubers 8–12 inches apart.
- Keep the soil lightly moist until you see green sprouts appear.
Container Gardening with Begonias
Begonias and containers are a match made in heaven. Because you can control the soil and the location of a pot, container gardening is often the easiest way to grow these flowers.
Choosing the Right Pot
You can grow begonias in almost any type of container, from terracotta pots to plastic window boxes. Just make sure the container has drainage holes at the bottom. If water cannot escape, the tubers may rot. For a single begonia, a 6-inch or 8-inch pot is usually sufficient. If you are planting a larger display, a wide planter can hold three or four tubers for a full, lush look.
Hanging Baskets
Cascading tuberous begonias are specifically bred for hanging baskets. Begonia Hanging Pink Balcony is a perfect fit for that kind of display, with stems that grow out and then drape downward, covered in blooms. When planting a hanging basket, you can place the tubers closer together than you would in the ground—about 4 to 6 inches apart—to create a dense curtain of flowers.
Potting Mix Tips
Avoid using "garden soil" in your pots. Garden soil is too heavy and can become compacted in a container. Instead, use a lightweight potting mix. Many mixes contain perlite or vermiculite, which are those little white specks that help keep the soil airy and well-drained.
Watering Wisely
Watering is perhaps the most important part of begonia care. Since these are succulent plants, they store some water in their thick stems and leaves. This means they are more forgiving of a little dry spell than they are of being overwatered.
The best way to tell if your begonias need water is to use the "finger test." Stick your finger into the soil up to the first knuckle. If the soil feels dry, it is time to water. If it still feels moist, wait another day or two. When you do water, try to water at the base of the plant rather than over the top of the leaves. Keeping the foliage dry helps prevent spotting and keeps the plant looking tidy.
In the heat of the summer, containers will dry out faster than garden beds. You might find that your pots need water every day or every other day, while your in-ground plants can go longer. Always adjust your watering based on the weather; if it has been raining, let nature do the work for you.
Nourishing Your Plants for More Blooms
To keep the flowers coming all summer long, begonias appreciate a little bit of extra nutrition. They are "heavy feeders," meaning they use up the nutrients in the soil quite quickly as they produce those large, beautiful blooms.
A balanced, water-soluble fertilizer is the easiest way to feed your begonias. You can find fertilizers specifically labeled for "flowering plants" or "blooming plants." These usually have a higher middle number (phosphorus), which is the nutrient responsible for flower production.
Following the instructions on the product label is key. Generally, feeding your plants once every two to three weeks is enough to keep them vigorous. If you notice the leaves are turning a bit pale, it might be a sign that the plant is hungry. On the other hand, if you see lots of lush green leaves but no flowers, you might be using a fertilizer with too much nitrogen. A balanced approach is always best.
Simple Maintenance and Deadheading
One of the reasons we love begonias is that they are relatively low-maintenance. They don't require constant attention to look good. However, a few minutes of "grooming" each week can make a big difference.
Deadheading
Deadheading is the process of removing faded or spent flowers. On tuberous begonias, the old flowers will eventually drop off on their own, but snapping them off once they start to look tired encourages the plant to put its energy into creating new buds. It also keeps the plant looking clean and prevents old petals from sticking to the leaves.
Pruning
If your begonias start to look a little "leggy" or stretched out, don't be afraid to pinch them back. Snapping off the very tip of a long stem will encourage the plant to grow side branches, resulting in a bushier, fuller plant. This is especially helpful for wax begonias and cane varieties.
Sanitation
If you see any yellowing or damaged leaves, simply pull them off. Removing any debris from the surface of the soil also helps keep the plant healthy and prevents pests from finding a hiding spot.
Beautiful Begonia Varieties to Explore
At Longfield Gardens, we offer a selection of begonias that have been trialed and tested for their performance. Choosing a variety that fits your style is part of the fun of gardening.
- Roseform Begonias: These are the classic tuberous begonias. As the name suggests, the blooms look remarkably like large roses. They come in vibrant shades of red, yellow, pink, and white.
- Picotee Begonias: These varieties feature petals with a contrasting color on the edges. For example, a yellow flower might have a bright red "lace" around the rim of each petal. They are incredibly elegant and look like they have been hand-painted.
- Fimbriata Begonias: If you like texture, Fimbriata varieties have "fringed" or ruffled edges that give the flowers a carnation-like appearance. They add a unique look to any shade garden.
- Hanging Basket Begonias: These are bred specifically for their trailing habit. They produce hundreds of smaller blooms that cascade down, making them ideal for eye-level displays on a porch.
Handling Common Challenges
While begonias are generally trouble-free, like any living thing, they can occasionally face challenges. Most of these are easily solved by adjusting how you care for the plant.
If you notice a white, powdery substance on the leaves, this is likely powdery mildew. It usually happens when the air is very humid and there isn't enough airflow around the plant. To fix this, you can move your containers to a slightly breezier spot and make sure you aren't watering the leaves late in the evening.
If the stems of your begonias feel soft or mushy, this is a sign of too much water. The best thing to do is stop watering and let the soil dry out completely. Check to make sure the drainage holes in your pots aren't blocked.
Occasionally, you might see small pests like aphids or spider mites. A gentle spray of water from a hose can often dislodge them, or you can use a mild insecticidal soap if the problem persists. Keeping your plants healthy with proper water and food is the best defense against pests.
Winter Care: What to Do When the Season Ends
As the temperatures begin to drop in the fall, you have a choice to make. You can treat your begonias as annuals and simply add them to your compost pile after the first frost, or you can save the tubers to plant again next year.
Saving begonia tubers is a great way to build your garden collection over time. Here is the simple process:
- Wait for the Foliage to Yellow: Once the weather cools, the plant will naturally start to slow down. The leaves will turn yellow, and the stems might start to lean.
- Dig Up the Tubers: Before a hard freeze hits, carefully lift the tubers out of the soil.
- Clean and Dry: Gently shake off the excess soil. Do not wash them with water, as you want them to stay dry. Place them in a cool, dry place for about a week to let the outer skin cure.
- Store for Winter: Place the dried tubers in a paper bag or a box filled with dry peat moss or sawdust.
- Find a Cool Spot: Store the box in a place that stays around 40°F to 50°F, such as an unheated basement or a cool closet. Check them once or twice during the winter to make sure they aren't shriveling up or getting soft.
In the spring, when the weather warms up again, you can bring the tubers out of storage and start the cycle all over again.
Key Takeaway: You can save begonia tubers by digging them up in the fall, drying them for a week, and storing them in a cool, dark place in a paper bag until next spring.
Growing Begonias as Houseplants
If you aren't ready to say goodbye to your begonias in the fall, many varieties—especially Rex and Cane begonias—make excellent houseplants. They enjoy the consistent temperatures of a home and can provide beautiful foliage year-round.
When growing begonias indoors, light is your most important factor. They need bright, indirect light. A window facing east or west is usually ideal. Avoid south-facing windows where the sun might be too strong, or use a sheer curtain to filter the light.
Indoor air can be quite dry, especially in the winter when the heat is on. Begonias appreciate a bit of humidity. You can place the pot on a tray filled with pebbles and a little bit of water. As the water evaporates, it creates a humid microclimate around the plant. Just make sure the bottom of the pot isn't sitting directly in the water.
Creating a Design with Begonias
When you plant begonias, think about how they will look with their neighbors. Because they love the shade, they are natural partners for other plants that thrive in low light.
Try planting begonias in front of tall, green hostas. The bright colors of the begonias will pop against the deep green or blue-green leaves of the hostas. You can also mix them with Coleus, which offers colorful foliage that complements the begonia blooms. For more inspiration, see our container pairings.
In containers, use the "thriller, filler, spiller" method. Use a tall Cane begonia as your "thriller" in the center. Surround it with wax begonias as your "filler," and add a cascading tuberous begonia or some creeping Jenny as your "spiller" at the edges. This creates a professional-looking arrangement that stays beautiful all summer.
Enjoying Your Garden
At Longfield Gardens, we believe that gardening should be a source of relaxation and pride. Begonias are one of those rare plants that offer a huge reward for a very small amount of work. They ask for little more than a shady spot and a bit of water, and in return, they give you months of spectacular color.
Whether you are planting your first tuber or you have been growing them for years, there is always something new to discover in the world of begonias. Their resilience and beauty make them a staple in any home landscape. We hope this guide helps you feel confident and excited about adding these wonderful plants to your garden this season.
Final Action Plan:
- Choose the right variety for your light and space.
- Wait for soil temperatures to reach 50°F before planting outside.
- Plant tubers 1 inch deep with the hollow side up.
- Water only when the soil feels dry to the touch.
FAQ
Can I plant begonias in full sun?
Most begonias prefer shade or partial shade, as direct afternoon sun can scorch their delicate leaves and flowers. However, wax begonias with bronze-colored leaves are much more tolerant of sunlight and can often handle sunnier spots if they are kept well-watered. Always check the specific needs of the variety you have chosen before planting.
Why are my begonia leaves turning yellow?
Yellowing leaves are usually a sign of either overwatering or underwatering. Check the soil moisture by sticking your finger an inch into the ground. If it is soggy, let it dry out; if it is bone-dry, give it a good soak. Yellow leaves can also occasionally mean the plant needs a boost of fertilizer to provide essential nutrients.
How long does it take for begonia tubers to sprout?
Begonia tubers are a bit slow to wake up and typically take about 2 to 4 weeks to show their first green sprouts. This depends on the temperature of the soil and the environment. Keeping them in a warm spot (around 70°F) will help them sprout more quickly than keeping them in a cool area.
Do I need to remove the dead flowers from my begonias?
While not strictly necessary for the plant's survival, removing dead flowers (deadheading) helps the plant look much neater. It also prevents old, rotting petals from sitting on the leaves, which can sometimes lead to fungal issues. For tuberous begonias, deadheading also encourages the plant to continue producing new buds for a longer blooming season.
